<!doctype html>
<html>
 <head>
  <meta charset="UTF-8">
  <meta name="Author" content="hello">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>
  <style type="text/css">
	*{margin:0;padding:0;}
	ul,ol{list-style:none;}
	a{text-decoration:none;}

	#box{
		width: 100px;
		height: 100px;
		background-color: #ddd;
	}

  </style>
 </head>
 <body>
	<div id="box">123</div>

	<script>
		var oBox = document.getElementById("box");
	</script>
 </body>
</html>
